The structure of the wire drawing die core can be classified according to its working properties; Entrance area, lubrication area, working area, sizing area, exit area; Five intervals. The inner diameter profile of the wire drawing die is very important, as it determines the tension required to compress the wire and affects the residual stress in the wire after drawing. The functions of each zone in the mold core are: the entrance zone, which facilitates threading and prevents steel wires from scratching the drawing die from the entrance direction; Lubrication zone, which facilitates the introduction of lubricant into the steel wire; The workspace is the main part of the mold hole, where the deformation process of the steel wire takes place, reducing the original cross-section to the required cross-sectional size. When drawing conical metal, the space occupied by the volume of the metal in the working area is a frustum, which is called the deformation zone. Cone half angle in workspaceα (also known as die hole half angle) is mainly used to determine the magnitude of the pulling force; The function of the sizing zone is to obtain the accurate size of the drawn steel wire; The export area is used to prevent the steel wire from being unevenly exported and scratching the surface of the steel wire.